We have used Atopica combined with Vanectyl P for severe allergic reactions. There was significant improvement with it. However, it is very costly and the likelyhood of the dog ever being removed from it is slim. Have you had testing done to know exactly what the allergies are to? Sometimes this allows a pattern for when the Atopica is required and when something less expensive could be used ie. Benedryl or Vanectly P on it's own. Presently the poplar tree allergy and grass allergy is very high in some areas of Canada therefore making it an intolerable time for some dogs.
"For every animal that dies in a shelter, there is someone somewhere responsible for its death".